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I 1,63",633 June 28, 927. w F. GROENE CRANK SHAFT LATHE Filed June 13, 1924 8 Sheets-Sheet 1 gnmntw NWILLIAM F CROENE,

June 28 1927. w. F. GROENE cam: SHAFT LATHE Filed June 1:5. 1924 s Sheets-Sheet 2 glvwwntoo WILLIAM F Gnosns,

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8 Sheets-Sheet 3 W w u w om F. o m 9 u u M W w, F. GROENE CRANK SHAFT LATHE Filed June 13. 1924 June 28, 1927 1,633,633 w. F. GROENE CRANK SHAFT LATHE Filed June 1 1924 8 Sheets-Sheet 4 43 36 WILLIAM F Ckosm;

2 3% y yaw June 28, 1927.

W. F. GROENE cmmx SHAFT LATHE 8 Sheets-Sheet 5 Filed June 13. 1924 l/Ela 1 Qnwmtoz WILLIAM F Creams,

June 28, 1927.

8 Sheets-Shes WILLIAM F 6R0:

6cm M410 2 June 1927 w. F. GROENE CRANK SHAFT LATHE 7 Filed June 13, 1924 8 Sheets-Sheet 7 gnwnloz 1,633,633 June w. F. GROENE CRANK SHAFT LATHE 8 Sheets-Sheet 8 Filed June 13. 1924 I gwucnkw WILLIAM F Gnosuz,

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Patented June as, 19.27.

urrso s r F F i Q E WILLIAM F. GEOENE, OE CINCINKILTI, OHIO, ASBIGNQE TO THE E. K. LEBLGNI. MACHINE TOOL COMPANY, OF CINCINNATI, OHIO, A CGREOBATZDH E DELAWARE.

CRANK-SHAFT LATHE.

' Application filed June 13,

An object of my invention is to provide a crank shaft lathe that will be automatic in its work of turning a crank shaft, and of then returning the parts to position for operating upon another article of the same kind.

Another object of my invention is to provide a simple and efficient device for the purpose stated.

Although my invention is disclosed as applied to a lathe generally referred to as a crank shaft lathe, -it will be readily evident that same may be appIied tO other machine tools without restriction to crank shaft lathes.

The foregoing, and other objects are attained by the means described herein, and disclosed in the accompanying drawings, in which 2 Fig. l is a front elevation of a device em bodying my invention.

Fig. 2 is an enlarged fragmental end view on line 2-2 of-Fig. 1.

Fig. 3 is a sectional view on line 33 of Fig. 2.

/Fig. 4 is a plan view, parts shown in section, of parts of the drive mechanism, form ing details of my invention.

Fig. 5 is a fragmental enlargement of parts shown in Fig. 4.

Fig. 6 is a sectional view on line- 66 of Fig. 5.

Fig. 7 is a sectional view on line 7-7 of Fig. 5.

Fig. 8 is an enlarged sectional view on line 8-8 of Fig. 2.

Fig. 9 is a sectional view on line 99 of Fig. 8.

Fig. 10 is an enlarged sectional view on line 10-10of Fig. 1.

Fig. 11 is a sectional view on line 11--11 of Fig. 10. i r

Fig. 12 is an enlarged sectional view on line 12-12 of Fig. 1.

Fig. 13 is a sectional view on line 1313 of F lg. 12.

Fig. 14 is an enlarged detail elevation of a fragment of the structure shown in Fig. 1.

Fig. 15 is a sectional view on line 15-15 of Fig. 1.

Fig. 16 is an enlarged sectional view on line Ill-16 of Fig. 15.

F ig. 17 is a sectional view on line 17-47 of Fig. 4.

Portions of the structure disclobed herein 1922. Serial K0. 713,306.

are substantialiy the same as shown in my co-pending application, Serial No. 627,175. filed March 255, 1923. The structure disclosed herein comprises a bed 20 provided .vith a tail stock 21, and a head stock 22. The bed has formed along its front andrear faces 23, ways 24, that slidably receive a reciprocating carriage 2.5. Structures comprising a reciprocating carriage such as 251m be provided on both sides of the lathe, and would be substantially identical in structure, wherefore the description of one will suflice for both. Thccarri-ige may he reciprocated longitudinally of the bed, in any suitable manner, for example as shown in Fig. 9. 'lhe lathg bed supports a revoluble shaft 26 that may be mounted on suitable bearings 27 carried by the lathe bed. The ends of 'the shaft 26 carry spur that engage racks 29 carried upon the inner faces of the carriages or slides 25. The shaft 28 may he rotutably actuated by any suitable means, for example the worm wheelBO driven from worm 31, mounted on shaft 32. The shaft 32 may he power actuated from the auxilicomplementary end 36 formed on the shaft 37. 'lhe shaft 37 is revolubly supported by a casing 44, which casing is carried by the bed, and at its inner end carries a bevel gear.

38. The gear 38 engages the bevel gear 39 mounted or. the tube shaft. 32. In order to preclude injury to an operator, resultant from the rotation of the crank 34, when the shaft 32 is power actuated, the crank 34 is provided with a cylindrical hub 40 that may be received in the arcuate seat- 41 formedin the lower end of the lever 42. 'The lever 42 controls the application of power from the motor 33 to the tube shaft By reference to Fig. 14, it will be evident. that when the crank 34 is mounted upon the shaft 36, the hub portion thereof locks the lever 42 against movement about the axis of said lever 4.2 on its axis. T he lever 42 is pinned to the shaft 43, which shaft 43 acts as the axis for lever'42. The shaft 43 extends through the chamber 45 formed within the casing 4:4, and carriesa segmental gear 46.

'80 ary motor or driving means 33 .or maybe The segmental gear 46 has gear teeth formed at diametrically opposed portions ther of. The gear sections engage reciprocating hafts 47 and 48 that extend through the easing 44 and have racks 49 and 50 formed =;r)n them. I and 48 extend from the casing 44 and may The lower ends of the shafts 4? lie engaged by lugs E51 adjustably mounted upon the slideor carriage The engagement of the lugs 51 upon the tapered lower nds of the shafts 47'and 48 serve to actuate the shafts upwardly whereby to return the shaft 43 and the lever 42 to a neutral position. The lever 42 is connected to an electrical sivitch indicated generally at 52 in Fig. l. The switch is contained within the casing 53 and a crank 54 disposed without the casing 53, controls the movement of shaft 169 forming part of the switch mechanism within the casing. The crank 54 is connectcd by means of tho lin 5;") with lever 42..

The referred to switch controls the motor 33: From the'foregoing, it will be evident that the feed of the slide or carriage 25 is ordinarily controlled by the engagement of the lugs carried by the slide, upon the reciprorating shafts 47 and 48. Because of the in: tel-locking features of the lever 42 and the crank 34, the crank 34 cannot be mounted upon the shaft 357 unless the lever 42 is in a neutral position. This interlocking feature precludes closing of circuits through the switch when the crank 34 is mounted on the shaft 37. V

Up n the lathe bed are mounted carriages .31 supporting too] holders 57. The ill" li:t; '0$ 56 are. adjustable longitudinally of the bed and may be fixedly mounted inadjusted positions by any suitable nil-ans such as bolts and means associated therewith commonly rmplo \-'cd'tor such purpose. The foregoing structure and the structure about to be desrribeil l;-' preferably in conformity with the disclo ures in my (o-pending application Seriah Xiunber GTGJHL filed November ll, 19225.; The lathe carriage carries revolubly mountedspurgcurs 5S and .380 that engage a ItU-Llt fiftfoririird on the lower face of the tool support-5?. The tool supports and the carriages it} are provided with coniplemental y drivei-ia'iled structures as is common in the art. Eachof the gears 58 and 580 engaged by one'of a pair of vertically reciprocat-i-ng'racks 60 and 61. The rack 60 carries a roller 62 at its lower end that engages the upper face of a cam bar 63 mounted on the slide 25. The lcwcr end of the rack 60 also carries a pivotally mounted block (34 and which block carries a roller 65 that engages the lower face of the cam bar 63. The block 64 is provided with a bore 66 therethrough, and through which boreextends a screw 67. The screw 67 carries a spring 68 that has its opposite ends in abutment upon the head of the screw, and upon end of the screw (-7 engages and is carried by the lower end f the rack til. From the foregoing it will be evident that as the car-- riage 25 is reciprocutcd longitudinally of the bed. the tool holders 5? will be reciprocatcd in conformity with the contours of the cam bars 63. The uppcrcnds of the cam bars extend in parallelism with the lino of reriprocation of'the carriage 25, wherefore. after the tools have done all their work, and the rollers associated with the racks 60 and (il reach the said parallel faces of the cam bars. the feed of the tool holders into the work will stop. From the foregoing, it will be. evident that certain of the toolholders may continue. to be fed alter others have finished their work, whereby to permit all tools to finish their work simultaneously or in a predetermined order.

Means are associated with the devices whereby to correlate the movement of the carriage and the turning of the work between the head stock 22 and the tail stoek'2l.

in devices of this kind, although thc'struclures at opposite ends of the lathe are ret'erred to herein as head and tail stocks, both said end structures constitute driving heads for positively turning the work. 'l hc means for positively (ll'lvil'lfl the spindles 'l'ocated upon the respective driving heads 21v and 22 will be explained at Jgreater detail hereafter, however, it is pointed out at this time that th shaft serves as a'powcr' transmitting means from driving head 22 to driving head 21. The means "for driving the work or for turning work and for correlating' the various elen'ientswvill now be described. Attention is culledto Figs land 4 The pulley it) may be driven from any suitable source. for example. by means of the belt 71. ll desired motion may be transmitted to the pulley 70 from a motor mount ed upon the head stock The pulley 70 c nstitutes an element of a combined brake and clutch structure. shown in ,cross section in llg. -l. and which structure may be of a type and form disclosed in my United States Letters Patent Number 1,474,112 of Novcmber 13, 1923; Briefly this structure comprises a tube shaft 72 that extends through the pulley 70 and carries a fixed friction disc 71 upon which friction rings 7.20. mounted for movement with the pulley 70, may be clamped by means of a reciprocating friction plate 78. The friction plate is moved to and from clamping: engagement. upon the friction rings 724') and friction discs 6, oy meansof fulcrumcd levers 74 that are actuated by a shaft 75 contained within the bore of the tube shaft 72, andby means of springs 76 that yieldinglyspace the friction collar and friction disc. The tube shaft 72 is provided with an'a perture communicating with the bore thereof, and through which asaasa aperture 81, a pin 77, carried by the shaft 75, extends. The pin 77 engages a collar 82 mounted upon the exterior of the shaft. 72, and said collar is engaged by a fork 80 carried by the shaft 78. From the foregoing, it will be evident that: rocking of the shaft 78 will serve alternately to move the clutch members associated with the pulley into driving and braking positions. The headstock 22 has formed within it a gear chamber 79 and it is with-in this chamber that the engagement between the shafts 78 and is effected. The tube shaft 72 carries a gear 88 that engages the gear 89 mounted on the shaft 90, see Fig. 17. The shaft 90 carries a gear 83 that engages a gear 84 mounted upon the spindle or shaft 85. The shaft 90 extends between the driving heads 21 and 22. The driving head 21 contains within it a chamber similar to the chamber 79 formed in the driving head 22 and within the chamber in driving head 21 are disposed gears similar to Flt-l and 84. The gear similar to gear 83 is mounted upon the shaft 90 and drives the gear similar to gear 84, said similar gear being associated with the spindle 96 associated with the secondary driving head 21. The shaft 75 may be manually reciprocated by means of a clutch lever 86, mounted on a shaft 87, that is connected to the shaft 75 in substantially the same manner in which the shaft 78 is connected to said shaft 75 for accomplishing reciprocation of the shaft 75. The shaft 78 constitutes part of an'automatic control as distinguished from the manual control ell'ectcd by the clutchlever 86 and its associated elements.

The shaft or spindle 85 extends through the side wall 91 of the chamber 79 and car rics a gear 92 in mesh with an idler gear 93. The idler gear 93 engages the gear .11 mount.- ed on the shaft 95. The foregoing train of gears are adapted to transmit motion from the primary driving means. or pulley 70, to the shaft 32 for feeding the carriage 25. The shaft 95 has mounted on it a. gear 97 that engages a gear 98 revolubly mounted uponthe lube shaft 352. The gcar,98 has a clutch element 99 formed at its one end. A complementary clutch element 100 is pinned to the shaft 252 and to a recipro ating shift bar 101 contained within the tube shaft 32. From the foregoing. it will be evident that by manipulating the cliuteh eomprising the clutch elem nts 99 and 1.00. the f -cd of the slide or carriage 25 may be controllcd from the primary driving means or pulley 7t). 'lhe'clutch element 100 carries a pin 102 that extends through an aperture 1H3 formed in the'tnbe shaft 32. said aperl' tlt being elongated and extending lengthwis ol' the tube shaft 32. From the foregoing. it will be evident that the clutch memlHl ltlt) may, be reciprocated longitudinally of the tube shaft The shift. bar 101 carries a spool 104. he spool en aged by a yoke 105 carried by the shaft. 10 ext nding forwardly from the bed, and oilitfll shalt carries a hand lever 107. The shaft .1116 is received by a housing 108, within which housing is contained a gear 101%. said gear being mounted upon the shaft. lot}, A reciprocating plunger extends through the honsin 108 and has a rack 111 formed there on. T e lower end of the shaft 11 extends downwardly from the hou ing 1on1 and may be engaged by a tug 112 adjusiahly mounted on the slide or carriage 2f. "the engagement of the lug 112 upon the shat't 11 scrvts to actuate the shift bar 101 longitudinally of .the tube shaft 32, whereby to disengage the lutch members 99 and ititt The lt'Yt'! W7 has formed on it a cam 11 having an art li-- ate nndt-rt'aee 114. An upwardly extending recess 115 is formed in the rear portion of the t'tllll 113. A bar 116 is pivotaliy mounted upon the casing 41 and carries a roller 11? that engages thc arcuate face 114, and may lodge in the recess 115. The bar 11o has its one end pivotallv connected to one end of a link 118 extending upwardly from the bar 116. The upper end of the link 11?; is pivotally connected to a crank 1 19, see Fig. 1, the object of which will be explained hereafter. A reciprocating bar 12 extends longitudinally of the lathe bed and extend through the casing 44. One end of the re ciprocating bar is pivotally mounted upon the lever 107. Sullicient play is provided between the pivotal mounting and the reciprocating bar 120 and the lever hi7 to permit reciprocation of said bar as a result of the oscillatory manipulation of the lever 107. The reciprocating bar 120 has formed in it notches, ctmiplenientary to the curvature of the shafts 47 and 4s. and the shafts 47 and 48 have notches fori'ned in them. complementary to the reeiprocatiin; rod 120. see Figs. 12 and 13. The purpose of providing the complementary notches is to permit locking of the shafts 47 and 48 against movement when the reeiproeating bar 120 is in a given position and to permit movement; of said shafts when the bar liltl is in a second position. The object of providing the said interlock is to preclude move meut of the lever '12 from its neutral position when the carriage 25 being driven from the primary driving means 70. When the clutch members associated with the tube shaft-'32 are disengaged. the notches in the reciprocating rod 120 are so positioned that the shafts 47 and 48 may be reciprocated vertically, thereby permitting movement of the lever 42 and consequent closing of the circuit embracing the auxiliary motor 33 by means of the switch 52.

The upper end of the link 118 is connected with he crank 119 as previously explained.

it i) ltll) mamas JUN!) HWY INN.

ing a driving connection between the auxildriving connection between the p fmarv driving means and the slide, for rerdeim;

iary driving means and the slide and for then severing the driving connection between the auxiliary driving means and the slide.

7. In a athe of the class described the combination of a primary driving means, a spindle, a severable driving connection between the spindle and theprimary driving means, a slide reciprocally mounted on the lathe, a severable driving connection between the slide and the primary driving means, an auxiliry driving means, a se. rable driving connection between the auxil iary driving means and slide, means for preeluding either severable driving connection associated with the slide from transmitting power to the slide when the -other of said severable drive connections is operative for transmitting motion to said slide, a tool reciprocally mounted on the Lathe, a connection between the tool and the slide whereby to convert movement of the slide into movement of the tool, means associated with the slide for severing the driving connection he-' tween the primary driving means and the spindle, for severing the driving connection between the primary driving means and the slide, for establishing a driving connection between the auxiliary driving means and the slide and for then severing the driving connection between the auxiliary driving means and the slide, the connection between the slide and the tool being adapted to temporarily render the tool quiescent prior to the severenoe of the driving connection bet ween the primary driving means and the spindle whereby to permit a determinable movement of the spindle prior to quiescence thereof.

8. In a lathe of the class described the combination of a primary driving means, a spindle. a severable driving connection lW- tween the spindle and the primary driving means, a slide reciprocally mounted on the lathe, a scverahle driving connection he twecn the slide and the primary driving means. a normally inoperative auviliary driving means. a sever-able driving conneclion between the auxiliary driving minus and slide, means for precluding cithcr soverahlc driving connection llftiflt'ltll d with the slide from transmitting power to the slide when the other of said scvcrablo drive connections is operative for transmitting mo ion to said slide, a tool reciprocally mounted on the lathe. a. connection bctvvccn the tool and the slide \vhcrclrv to convert movement of the slide into movement of the tool. means controlled by the slide for severing the driviugt'omlcclion bctvvccn the primary driving means and the spindle. for severing the the auxiliary driving means operative, and for then rendering the aux liary d:iving n'ieans again inoperative.

9. In a lathe of the class deer d the combi ration oi a prin'iary driving 'l i :zn., a spindle, a sever-able driving connection between the spindle and the primary driving means. a slide reciprocally mounted t!" the lathe, a severahle driving connection between the slide and the primary driving mia-ris, a normally inoperative auxiliary driving means, a sevcrable driving iiOjt't-MitiOl between the auxiliary driving means and slide, means for precluding either sevcrabie driving connection associated with the slidefiom transmitting power to the slide when the other of said severablc drive connections is operative for transmitting motion tr. said slide, a tool reciprocally mounted or the lathe, a connection between the tool and ti e slide whereby to convert movement of the slide into movement of the tool, means uTltrolled by the slide for severing the driving connection between the primary driving means and the spindle, for rendering the driving connection between the auxi iai'v driving means operative, and for then rein dering the auxiliary driving means agan'i ii:- opcrative, the connection between the slice and tool being adapted to temporarily ren der the tool quiescent prior to the severence of the driving connection between the primary driving means and the spindle where'- by to permit a determinable movement of the spindle prior to quiescence thereof.

10. The combination with a lathe comprising a revolving spindle adapted to move work, tool holders for operation upon the work, means for revolving the spindle, and means for moving the tool holders relative to ork associated with the spindle, the tool holders being adapted to assume a renal or lit-ginning positi iin, oi means for arrest ing rclative movement o he tool holders, means for rendering a determinable continuit v of rotation of the spindie and for then rendering the means for revolving the spind e inoperative upon the spindle, auxiliary means for then returning the tool holders to their beginning or normal posi tion, and interlocking means for precluding operation of the enumerated means in other than their prcdctcrmincd order.

in testimony whereof. I have hereunto subscribed my name this 28th day of May, 1924.

WILLIAM F. (moans. 

